23147545 has 32 divisors (see below), whose sum is σ = 30818304. Its totient is φ = 16632000.

The previous prime is 23147543. The next prime is 23147561. The reversal of 23147545 is 54574132.

23147545 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 23147545 - 2¹ = 23147543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23147543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153220 + ... + 153370.

It is an arithmetic number, because the mean of its divisors is an integer number (963072).

Almost surely, 2^23147545 is an apocalyptic number.

It is an amenable number.

23147545 is a deficient number, since it is larger than the sum of its proper divisors (7670759).

23147545 is a wasteful number, since it uses less digits than its factorization.

23147545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its digits is 16800, while the sum is 31.

The square root of 23147545 is about 4811.1895618443. The cubic root of 23147545 is about 284.9935158061.

The spelling of 23147545 in words is "twenty-three million, one hundred forty-seven thousand, five hundred forty-five".